Tkinter Notes

Terms and Concepts

• Widget: Elements the make up the GUI
  • Invisible container widgets (e.g. Frame)
  • Visible interactive widgets (e.g. Button)
• Layout: Organizing widgets on GUI to specific positions
• Event: Objects that are generated for user or system actions, such as mouse click

Widgets

Tkinter provides 18 built-in widget implementations.

• Button
• Canvas
• Entry
• Scrollbar
• Frame

Hello Tkinter

Code: 00_hello_tkinter.py

• Initialization: Create Tk root which is a window
  • One root per application
  • It should be created before anything else

Button Widget

Code: 01_button_widget.py

• Used for adding buttons in a Python application
• Can display text or images
• You can attach a function or a method to a button which is called automatically when the button is clicked

Checkbutton Widget

Code: 02_checkbutton_widget.py

• Provides a checkbox with a text label
• Has two states: on and off
• Denotes a boolean property (True and False)

Label Widget

Code: 03_label_widget.py

• Used to display text tor images
• No user interaction

ListBox Widget

Code: 04_listbox_widget.py

• Displays a list of entries
• Allows selecting one or multiple items

### Entry Widget

Code: 05_entry_widget.py

• Used to accept single-line text from a user
• Use the Label widget if
  • You want to display one or more lines of text that cannot be modified by the user
• Use Text widget if:
  • You want to display multiple lines of text that can be edited

Text widget

Code: 06_text_widget.py

• Provides formatted text display
• Allow you to display and edit text with various styles and attributes
• Supports embedded images and windows